pfluger



(No Model) 2 Sheets-Sheet 1. G. A. PPLUGER.

ELECTRIC ARC LAMP.

No. 539,393. Patented May 14, 1895.

2 Sheets-Sheet 2.

(N0 Model.)

0. A. PPLUGER.

ELECTRIC ARC LAMP.

No. 539,393. Patented May 14, 1895.

In 7 7 W 3 I Wwz? m .1 7 72w flifzl/ 1m: ream; swan, c0. vnorqumon wAsmNmoN. 3.

UNITED STATES PATENT OFFICE.

CHARLES A. PELUGER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE STANDARD ELECTRIC COMPANY, OF SAME PLACE.

ELECTRlC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 539,393, dated May 14, 1895.

Application filed July 2, 1894. Serial Ilo.516,327. (N model.)

f0 (ZZZ whom it may concern.-

Be it known that 1, CHARLES A. PFLUGER, a citizen of the United States, residing at- Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Are Lamps, of which the following is a specification.

My invention relates to are lamps and has for its object to provide a new and improved in are lamp, of which the following is a description, reference being had to the accompanying drawings, wherein- Figure 1 is a side View in part section. Fig. 2 is a plan View with parts broken away.

Figs. 3, 4, and 5 are detail views. Fig. 6 is a modification of the carbon-moving pinions for a continuous-current lamp.

Like letters refer to like parts throughout the several figures.

2 o The carbonsAB preferably curved as shown, are held in the carbon holders, A B which are attached to the plates or strips A B but are insulated therefrom. (See Fig. 5.) These strips are each fastened to one of the bevel 2 5 gears A B (see Fig. 5) so as to revolve therewith. Said bevel gears work on the shaft B having bearings in the supports B Said supports are fastened to the plate B A shaft B passes through the plate B and is provided atone end with the pinion B working between the bevel gears A B and at the other end with the ratchet wheel 13. The circular plate A' is attached to the supports B which project below the bevel gears A B Said 3 5 plate protects the gears from the heat of the arc and also acts as a reflector. Said plate is slotted to allow the passage of the strips A 13 when the carbons become short, the length of the slots being such that the motion of the 40 carbons is stopped before the carbon holders come together. Resting upon the plate 13 but insulated therefrom is the solenoid C. The core C of said solenoid is fastened to the piece C preferably of non-magnetic material,

the whole forming a circle or wheel as shown.

C C are arms projecting from the piece C and meeting at the center of the circle. The pin C passes through said arms so as to form an axis for the wheel. Said pin works in hearings on the support C and block 0 as shown. By this arrangement the solenoid C and piece C are mounted like the balance wheel of a watch and are free to oscillate.

The center of the ratchet wheel B is placed at one side of the center of the wheel formed 5 by core C and piece Cso that the two wheels are not concentric.

An arm C projects upwardly from the piece C and is provided with the pawl C adapted to engage the teeth on the ratchet wheel B A lug C on pawl C engages the pin C and limits its inward motion. A spring C acts against the pullof the solenoid C. The plate B upon which the solenoid C rests is fastened to the annular piece or ring D projecting from the top or cover D of the lamp and hence the solenoid and associated mechanism are entirely separated from the chamber containing the are.

The globe E of the lamp is adapted to inclose the arc in a practically air tight chamber and fits into the groove E in the annular piece or ring E and is held in place by the wires E E Said wires pass through the lugs E on the ring E and are held in place in any convenient manner as by nuts E E E are eye bolts projecting from the ring E.

E is an air valve opening outwardly to allow the pressure within the globe due to the 8o heat of the arc, to be relieved. I may use ordinary pins or the like instead of eye bolts E One edge of said ring E is adapted to fit into the groove D on the lower edge of the top or cover D. This groove as well as the groove E in ring E is supplied with packing so that an air tight joint may be made. The bent levers D D are pivoted at D to the top or cover D and are provided at their free ends with the hooks D D (Fig. 4) adapted to engage the eye bolts E E The arms F F pivoted at F F are provided with the cams F E which are adapted to engage and lift the bent levers D D when the said arms are forced over so as to rest upon the top or cover D as shown in full lines; When the arms F F are in this position, the hooks D D are raised and on account of their engagement with the eye bolts E E", the upper edge of the ring E is forced against the packing in r .o the groove D so as to make a practically air tight joint.

2 teases H H are the two binding posts of the lamp. The solenoid C is connected to the binding post H and to carbon holder A. Carbon holder B is connected to binding post H.

The lamp as shown is an alternate current lamp and hence the carbons move with equal speed. When it is desired to use the lamp as a continuous current lamp, the carbon moving ears will be constructed as shown in Fig. 6. The pinion B engages the gear A and a a smaller pinion I on the extended end of the shaft B engages the gear B The positive carbon is connected with the gear A and the negative carbon with the gear B By this arrangement the positive and negative car bons can be fed at different speeds and the are kept approximately in the same place.

I have shown the lamp as having only a series coil but I may also use a shunt coil in connection with the series coil when desirable. The lampmay be supplied with any desirable cut-out.

It is evident that these several parts may be changed in form, construction and arrangement without departing from the, spirit of my invention. and I therefore do not wish tobe limited to the construction shown.

The use and operation of my invention are as follows: Whenv no current isflowing through the lamp the mechanism will be in the position shown in Figs. 1 and 2. When the current is turned onthe solenoidO is en'- ergized and attracts its core 0. The wheel composed of the core 0' and the piece 0 is moved about its axis in the direction of the arrow carrying with it the pawl 0 (Fig. 2.) On account of the eccentric position of said wheel and the ratchet wheel 13*, the pawl O engages the teeth of said ratchet wheel and moves it also in the direction of the arrow. The movement of said ratchet wheel is communicated by shaft B and pinion B to the gears A and B causing said gears to move in opposite directions. Since the carbons are connected to said gears, this movement separates said carbons,and forms the arc, the current being traced as follows:v from binding post H to solenoid 0; thence through carbon holder A carbon A and carbon B. to the negative binding post H. When the length of the arc becomes too great, the current through the solenoid O is decreased and the spring 0" moves the core 0' and pawl O in a direction opposite to that of the arrow and releases or partially releases the ratchet wheel B The weight of the carbons then acts to bring them nearer together. -As the carbons burn away the pawl will be moved back until a. tooth on the ratchet wheel slips past. the pawl on account of the pawls inward motion being limited and hence the entire carbons will in time be consumed.

The construction of the globe andv its manner of attachment to the lamp allow the carbons to burn in a rarefied atmosphere and prevent oxygen from being admitted to the arc. Under these conditions the carbons last much longer than when exposed to the air and hissing of the lamp is obviated. When it is desired to remove the globe for any reason as to recarbon the lamp, the arms F F are moved to an upright position as shown in dotted lines. The cams F F are then in an oblique position and the bent levers D D and hooks D D move downwardly so as to lower the globeE and ringE When in this position the eyebolts E E may be lifted out of the hooks D D and the globe removed. When the eyebolts E E are again put in the hooks D and the arms F moved to their normal position, the upper edge of the ring E is'forced tightly against the packing in the groove D so as to form a practically air tight joint. While the arms F F are in this position the globe cannot be removed. The air valve E allows the pressure in the carbon. chamber to be relieved when the air isexpanded by the heat of the arc.

The top or coverD of the lamp maybe perforated within the annular projection D so as to give the, air free access to the chamber of the controlling mechanism.

It will be seen that I have here a lamp having two chambers one for the carbons and one for the controlling mechanism, the former-being sealed so as to exclude the air and the latter indirect communication with the atmosphere.

The operation of the lamp is the same as described above when used. with continuous currents or when a differential coil is used.

By this construction I get an economical and efficient lamp that will burn many hours without renewing the carbons. This lampis alsoshort and takes up very little room and is of such shape as to afford room for ornamentation.

I claim-- 1. The combination in an arc lam-p of two curved carbons, each attached to a bevel gear, a driving pinionv meshing'with both of said gears, a ratchet wheel connected to said pinion and adapted to rotate about a center, a solenoid having a rotatable core mounted eccentrically with respect to the said ratchet wheel, a spring or the like acting against said solenoid, a pawl connected with said core and adapted to engage said ratchet wheel whereby the carbons are fed, substantially as described.

2. The combination in an arc lamp of a solenoid, the core of which is adapted to rotate or move about a point or. center, a pawl connected with said core, a ratchet wheel adapted to be engaged by said pawl and rotating about a different center and connections between the ratchet wheel and the carbons, whereby the'carbons are fed, substantially as described.

3. An arc lamp comprising asolenoid, the core of which is adapted to move about a center, a ratchet wheel adapted to move about a dilferent center and a pawl or the like connected to the solenoid core and adapted to engage the teeth of said ratchet wheeL' IEO 4. The combination in an arc lamp of a top or cover, bent levers pivoted to said cover and provided at one end with hooks adapted to engage pins or the like associated with the globe of the lamp, and pivoted arms provided with cams adapted to engage said bent levers whereby the globe is held in place, substantially as described.

5. The combination in an arc lamp of a top or cover provided with a groove at its under edge, a globe attached to a ring, the upper edge of which is adapted to fit into said DONALD M. CARTER,

Witnesses: I WALTER J. GUNTHORP. 

